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<div class="title">FocusTraversalOnArray.java</div>  </div>
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<a href="_focus_traversal_on_array_8java.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*******************************************************************************</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) 2011 Google, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * All rights reserved. This program and the accompanying materials</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * are made available under the terms of the Eclipse Public License v1.0</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * which accompanies this distribution, and is available at</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * http://www.eclipse.org/legal/epl-v10.html</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> * Contributors:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> *    Google, Inc. - initial API and implementation</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> *******************************************************************************/</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"><a class="line" href="namespaceorg_1_1eclipse_1_1wb_1_1swing.html">   11</a></span>&#160;<span class="keyword">package </span>org.eclipse.wb.swing;</div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;</div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="keyword">import</span> java.awt.Component;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="keyword">import</span> java.awt.Container;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="keyword">import</span> java.awt.FocusTraversalPolicy;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html">   24</a></span>&#160;<span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html">FocusTraversalOnArray</a> <span class="keyword">extends</span> FocusTraversalPolicy {</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;    <span class="keyword">private</span> <span class="keyword">final</span> Component m_Components[];</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;    <span class="comment">//</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    <span class="comment">// Constructor</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    <span class="comment">//</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#afe12b5a6dda665e8eeeb83e394d203e6">   31</a></span>&#160;<span class="comment"></span>    <span class="keyword">public</span> <a class="code" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#afe12b5a6dda665e8eeeb83e394d203e6">FocusTraversalOnArray</a>(Component components[]) {</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;        m_Components = components;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    }</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    <span class="comment">//</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    <span class="comment">// Utilities</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    <span class="comment">//</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment"></span>    <span class="keyword">private</span> <span class="keywordtype">int</span> indexCycle(<span class="keywordtype">int</span> index, <span class="keywordtype">int</span> delta) {</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;        <span class="keywordtype">int</span> size = m_Components.length;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;        <span class="keywordtype">int</span> next = (index + delta + size) % size;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;        <span class="keywordflow">return</span> next;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    }</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    <span class="keyword">private</span> Component cycle(Component currentComponent, <span class="keywordtype">int</span> delta) {</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;        <span class="keywordtype">int</span> index = -1;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        loop : <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; m_Components.length; i++) {</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;            Component component = m_Components[i];</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;            <span class="keywordflow">for</span> (Component c = currentComponent; c != null; c = c.getParent()) {</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;                <span class="keywordflow">if</span> (component == c) {</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;                    index = i;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;                    <span class="keywordflow">break</span> loop;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;                }</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;            }</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        }</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;        <span class="comment">// try to find enabled component in &quot;delta&quot; direction</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        <span class="keywordtype">int</span> initialIndex = index;</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;        <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;            <span class="keywordtype">int</span> newIndex = indexCycle(index, delta);</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;            <span class="keywordflow">if</span> (newIndex == initialIndex) {</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;            }</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;            index = newIndex;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;            <span class="comment">//</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;            Component component = m_Components[newIndex];</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;            <span class="keywordflow">if</span> (component.isEnabled() &amp;&amp; component.isVisible() &amp;&amp; component.isFocusable()) {</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                <span class="keywordflow">return</span> component;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;            }</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;        }</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;        <span class="comment">// not found</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        <span class="keywordflow">return</span> currentComponent;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    }</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    <span class="comment">//</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    <span class="comment">// FocusTraversalPolicy</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    <span class="comment">//</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a53831163aea452c9a39ab465f3336f28">   77</a></span>&#160;<span class="comment"></span>    <span class="keyword">public</span> Component <a class="code" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a53831163aea452c9a39ab465f3336f28">getComponentAfter</a>(Container container, Component component) {</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        <span class="keywordflow">return</span> cycle(component, 1);</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    }</div>
<div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a874a74ce5c6519b3f7326ab9bb331fed">   80</a></span>&#160;    <span class="keyword">public</span> Component <a class="code" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a874a74ce5c6519b3f7326ab9bb331fed">getComponentBefore</a>(Container container, Component component) {</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;        <span class="keywordflow">return</span> cycle(component, -1);</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    }</div>
<div class="line"><a name="l00083"></a><span class="lineno"><a class="line" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a3225132b4a5a35f10fc603be869c7e40">   83</a></span>&#160;    <span class="keyword">public</span> Component <a class="code" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a3225132b4a5a35f10fc603be869c7e40">getFirstComponent</a>(Container container) {</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;        <span class="keywordflow">return</span> m_Components[0];</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    }</div>
<div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a51e02e7d7f44d17960f866d6ff5a522e">   86</a></span>&#160;    <span class="keyword">public</span> Component <a class="code" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a51e02e7d7f44d17960f866d6ff5a522e">getLastComponent</a>(Container container) {</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        <span class="keywordflow">return</span> m_Components[m_Components.length - 1];</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    }</div>
<div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a2a46213d62b328e35fe632282c4911d0">   89</a></span>&#160;    <span class="keyword">public</span> Component <a class="code" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a2a46213d62b328e35fe632282c4911d0">getDefaultComponent</a>(Container container) {</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;        <span class="keywordflow">return</span> <a class="code" href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a3225132b4a5a35f10fc603be869c7e40">getFirstComponent</a>(container);</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    }</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;}</div>
<div class="ttc" id="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array_html_a874a74ce5c6519b3f7326ab9bb331fed"><div class="ttname"><a href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a874a74ce5c6519b3f7326ab9bb331fed">org.eclipse.wb.swing.FocusTraversalOnArray.getComponentBefore</a></div><div class="ttdeci">Component getComponentBefore(Container container, Component component)</div><div class="ttdef"><b>Definition:</b> <a href="_focus_traversal_on_array_8java_source.html#l00080">FocusTraversalOnArray.java:80</a></div></div>
<div class="ttc" id="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array_html"><div class="ttname"><a href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html">org.eclipse.wb.swing.FocusTraversalOnArray</a></div><div class="ttdef"><b>Definition:</b> <a href="_focus_traversal_on_array_8java_source.html#l00024">FocusTraversalOnArray.java:24</a></div></div>
<div class="ttc" id="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array_html_a2a46213d62b328e35fe632282c4911d0"><div class="ttname"><a href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a2a46213d62b328e35fe632282c4911d0">org.eclipse.wb.swing.FocusTraversalOnArray.getDefaultComponent</a></div><div class="ttdeci">Component getDefaultComponent(Container container)</div><div class="ttdef"><b>Definition:</b> <a href="_focus_traversal_on_array_8java_source.html#l00089">FocusTraversalOnArray.java:89</a></div></div>
<div class="ttc" id="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array_html_a53831163aea452c9a39ab465f3336f28"><div class="ttname"><a href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a53831163aea452c9a39ab465f3336f28">org.eclipse.wb.swing.FocusTraversalOnArray.getComponentAfter</a></div><div class="ttdeci">Component getComponentAfter(Container container, Component component)</div><div class="ttdef"><b>Definition:</b> <a href="_focus_traversal_on_array_8java_source.html#l00077">FocusTraversalOnArray.java:77</a></div></div>
<div class="ttc" id="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array_html_a51e02e7d7f44d17960f866d6ff5a522e"><div class="ttname"><a href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a51e02e7d7f44d17960f866d6ff5a522e">org.eclipse.wb.swing.FocusTraversalOnArray.getLastComponent</a></div><div class="ttdeci">Component getLastComponent(Container container)</div><div class="ttdef"><b>Definition:</b> <a href="_focus_traversal_on_array_8java_source.html#l00086">FocusTraversalOnArray.java:86</a></div></div>
<div class="ttc" id="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array_html_afe12b5a6dda665e8eeeb83e394d203e6"><div class="ttname"><a href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#afe12b5a6dda665e8eeeb83e394d203e6">org.eclipse.wb.swing.FocusTraversalOnArray.FocusTraversalOnArray</a></div><div class="ttdeci">FocusTraversalOnArray(Component components[])</div><div class="ttdef"><b>Definition:</b> <a href="_focus_traversal_on_array_8java_source.html#l00031">FocusTraversalOnArray.java:31</a></div></div>
<div class="ttc" id="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array_html_a3225132b4a5a35f10fc603be869c7e40"><div class="ttname"><a href="classorg_1_1eclipse_1_1wb_1_1swing_1_1_focus_traversal_on_array.html#a3225132b4a5a35f10fc603be869c7e40">org.eclipse.wb.swing.FocusTraversalOnArray.getFirstComponent</a></div><div class="ttdeci">Component getFirstComponent(Container container)</div><div class="ttdef"><b>Definition:</b> <a href="_focus_traversal_on_array_8java_source.html#l00083">FocusTraversalOnArray.java:83</a></div></div>
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